Snubbed bolster truck



Sept. 18, 1951 G. E. DATH SNUBBED BOLSTER TRUCK 2 Sheets-Sheet l Filed Oct. 17. 1949 Patented Sept. 18,1 1951 George ErDathf-Mokena, Ill., assignor to W. H.

- Miner,.Inc., Chicago, Ill., a corporation of Dela- Application octotsii, 1948, serial No. 121,788

This invention relates snubbed bolster trucks.

One object of the invention is to provide in to improvements in a railway car truck, means for eifectively snubbing vthe action of the usual truck springs by frictionally resisting upwardand downward movement of the truck bolsterl of the can AA more specific object of the invention is to provide friction means for snubbing or dampening the action of truck springs of a'railway car, comprising spring actuated friction blocks, mounted on the truck side frames, with which the truck bolster has sliding frictional engagement, wherein means is provided for compensating for wear of the'friction blocks and cooperat- `ing friction faces of the bolster.

Other objects of the invention will more clearly appear from the description and claims hereinafter following.

In the accompanying drawings forming a part `of this specification, Figure 1 is a side elevational view. partly broken away, of a portion of one 'of the side frame members of a railway car truck and the associated bolster and truck springs, illustrating my improvements in connection therewith. Figure 2 is a transverse, vertical sectional view, corresponding substantially to the line 2-2 of Figure 1. Figure 3 isa longitudinal, vertical sectional View, on an enlarged-scale, corresponding substantially to the line 3-3 of Figure 2. Figure 4 is a transverse,vvertical sectional view, corresponding substantially to the line 4-4 of Figure 3, with the bolster and truck springs omitted. Y

In said drawings, I indicates one of the side `frame members of a railway car truck. The side frame member 0 is in the form of a casting and has top and bottom, horizontal members and I2 connected by spaced, vertically disposed sections |3-I3, and inclined sections III-I4. As will be understood by those skilled in this art, the truck includes two side frame members lll-I0, a truck bolster I5, and the usual truck springs |6-|6, comprising two clusters at opposite sides of the truck, supported on thelower members |2-I2 by the usual spring plank The opposite ends of the bloster are guided between the sections |3| 3 of the truck side frames, and the bolster is supported by the springs |6| 6. The truck bolster, in turn, supports the body bolster of the car.

As shown in Figures l and 3, the sections |3| 3 have inwardly offset portions at their upper ends, which provide guides |8-I8 at opposite sides of the bolster I on which the latter is 4 claims. (c1. 10s-197) vertically slidable. The vertical side faces at opposite sides of the bolster I5, which cooperate with the guides |8-|8, are substantially iiat and The vertical sections |3| 3 of each side frame casting I0 include vertical side walls 20-20 and inner and vouter webs 2| and 22, which are at right angles to each side wall.

Referring to the drawings, my improved snubbing means comprises broadly a pair of friction shoes A-A, carried by each side frame member, having frictional contact with the bolster at opposite sides thereof; a pair of hollow wedge blocks B-B in wedging engagement with wedge faces on the side frame, and carrying the shoes A-A; springs C-C reacting between the wedge members and the shoes for pressing the latter against the friction surfaces of the truck bolster of the car; and springs D-D reacting between the side frame and the wedge blocks to force the latter against the wedge faces of the side frames.`

In carrying out my invention, as illustrated in the drawings, I provide pockets 23-23 in the side frame member at each side of the bolster opening thereof. Each pocket 23 is formed by the inner and outer webs 2| and 22 of the section I3 of the side frame, a vertical rear or back wall 24, a horizontal top wall 25, provided by the top -web of the side frame, and an inclined bottom wall 2B, presenting a wedge face 21.

The shoes A-A are two in number for each side frame member, four such shoes being provided in each truck. The shoes A-A are allv of similar design and are arranged in pairs at opposite ends of the truck bolster I5. Each shoe A is in the form of aflat plate, having a at, vertically disposed friction surface 28 on its outer side and a'pair of laterally projecting, spring centering lugs 29-29 on its inner side. Each shoe A is carried by the corresponding hollow wedge block B.

The wedge blocks B-B are also four in number for each railway car truck and are slidingly mounted in the pockets 23-23 and 23-23 of the two side frame members' of the truck. Each wedge block B is in the form of a rectangular. boxlike cage open at its outer side and having a vertically disposed, back wall |29, vertically disposed side walls 30-30 extending at right angles to said back wall, a horizontal top wall 3|, and an inclined bottom Wall 32, presenting an outer wedge face 33. A wedge block B is slidingly mounted in each of the pockets 23 of the side frame members, being arranged vertically in said pocket and having its wedge face 33 in wedging engagement with the wedge face 21 of said pocket, the block being guided for vertical movement by the vertically extending guide ribs 36-36 pro- Jecting from the back wall 24 of the pocket. The wedge block B is forced against the wedge face 21 of the corresponding pocket 23 by one of the springs D, which is interposed between the top wall 3l of 'the wedge ,block B and the atop wall 25 of the pocket '23,?being held in centered position by lugs 34 and 31 projecting from said top wall 3| of the wedge block B and said top wall 25 of the pocket.

As hereinbefore mentioned, each hollow wedge block B carries one of the .friction shoes A, .the

shoe A being arranged in the `openingnf 4the'hollow wedge block for lateral movement inwardly vand outwardly of said hollow block. .and held yieldingly pressed against the corresponding s'ide of the bolster by the springs C, two of which are employed in connection with each shoe A and'oofmerating hollow -wedge vblock rB. .The two .springsC--C are arranged one aabovethe other, :in .horizontal position, lwith ltheir inner .and outer lends bearing on the inner side of .the shoe .A :andtheinnersidefof the back wall |29 .of the wedgeblock B, being-.held .centered by rearwardly projecting 'lugs .2B-,29 on Ithe shoe A. vIn -the assembled condition of the mechanism,L all .of the springs C 'and' D Vare under initial compression. The =spring .D of `each wedge block thus forces the-latter downwardly against-the .wedgerfaoe 21 of the .corresponding pocket, and the springs C-.C' force the shoe- A .outwardly of the wedge -block lB .against-the-ffriction .surf ace at `the corresponding side-.of the bolster.

The action of the ytruck springs IS-I6 of `the `railway-car are `leffectively snubbed by the fricftional resistance against movement'of the-bolster t5 `aiorded .by the friction shoes A-A, which .are .pressed ,tightly lagainst the bolster Yfriction surfaces .bythe springs `C--C. As wear occurs .on-the cooperating friction surfaces ofthe bolster `and shoes, the springs-D-D, acting-onthe wedge `blocks B-B, wedge .the latteroutwardly along ltheV lwedge faces -.21-2-1, .thereby .tightening .the

.springs .C-C against the shoes A and thus com- ;pensating .for wearof the friction surfaces.

.1. .1n a railwaycar truck,the combination with side frames providedlwithbolster-guides, a truck fbolster,A and springs supporting said bolster -on .the truck side frames -between said guides; of ipockets yin eachside frame atio'pposite sides Yof the bolsterat sa-idbolster-guides; a friction shoe .infeachfpocket having sliding v,frictional engage- .ment with-the. corresponding .side ofthe bolster.; .ahollow ywedge block in -.each `pocket in which .said-:shoe .is .laterally displaceable; springs -in .said hollow v.wedge block pressing against said -shoe .forforcingthe same against -said bolster; a wedge face in each of said pockets with which thewedge fblock .has -wedging yengagement to fforce said -.-.block-outwardly of thepocket towardsaidbolster; #andra spring within-.eachof said poekets=pressing .against thecorresponding wedge block to force .thefsame toward the .wedge facel'offsaid pocket.

2. 1n a railway car truck, the combination with side frames provided with bolster guides, a truck bolster, and springs supporting said bolster on the truck side frames between said guides; of pockets in each side frame at opposite sides of the bolster at said bolster guides; a friction shoe in each of said pockets bearing on the correspond- :ing side of the bolster.; `spring means `bearing at '.oneend onsaid shoe antipressingit against the bolster; a member in each pocket bearing on the other end of said spring means; and spring actuated means wedging said member against said Vspring `means for tightening said spring means .againstsaid shoe as =Wear occurs on the engaging .portions ofrsaid bolster and shoe.

3. In a railwayrlcar truck, the combination with ,truck side frame members, a truck bolster, and springs supporting lsaid bolster on said side frame members, said side frame members being provided with bolster guides; of a vertically disposed,

.laterally .opening ,pocket in one .of .said .side

frame members at the bolster guide, .-said pocket having .an .inwardly .and downwardly .inclined wedgeiaceatits lowerend; ahollow wedge block vhaving a `wedgeaceat its. lower end engaged with .the .wedge face of .said pocket; .a .spring within said pocket pressing -agains't -said block .to ,force .the :wedge .face .of Athe latter against said .wedge faceof :said pocket; a .vertically disposed .friction shoein sliding :frictional contact .with thebolster, said .shoe .being displaoeable .laterally inwardly .and `outwardly .of said .hollow wedge block; .and Va spring .reacting between .said block and shoe forforcing the latter `.against .the4 bolster.

4. .Ina railway car truck,thefcombination.with truck side framamembers, :a truck bolster, and

.springs-.supportingsaid.bolster on `the side .frame members, .said :side .frame .members being :provided with bolster guides; of a vertically .dis-

-posed, laterally yinwardly -opening Apocket -in .one

aofvsaid sideframe-members at the .bolster guide.

said l.pocket:having .a vertically .extending back .between saidshoeand block .to force the former .against said bolster.

.GEORGE 1E. DATH.

REFERENCES 'CITED The :following :references `lare of record in :the

:le..of this ypatent:

UNI-TED STTES PATENTS Number 72,318,414 

